Datasheet

Data Sheet ADP1649
Rev. 0 | Page 3 of 28
SPECIFICATIONS
V
IN
1
= 3.6 V, T
J
= −40°C to +125°C for minimum/maximum specifications, and T
A
= 25°C for typical specifications, unless otherwise noted.
Table 1.
Parameter
2
Test Conditions/Comments Min Typ Max Unit
SUPPLY
Input Voltage Range 2.7 5.0 V
Undervoltage Lockout
Threshold V
IN
falling 2.3 2.4 2.5 V
Hysteresis 50 100 150 mV
Shutdown Current (I
Q
), EN = 0 V T
J
= −40°C to +85°C, current into VIN pin, V
IN
= 2.7 V to 4.5 V 0.2 1 µA
Standby Current (I
STBY
), EN = 1.8 V
T
J
= −40°C to +85°C, current into VIN pin, V
IN
= 2.7 V to 4.5 V
3
10
µA
Operating Quiescent Current Torch mode, LED current = 100 mA 5.3 mA
Switch Leakage, SW T
J
= −40°C to +85°C, V
SW
3
= 4.5 V 2 µA
T
J
= 25°C, V
SW
3
= 4.5 V 0.5 µA
LED DRIVER
LED Current
Assist Light, Torch Assist light value setting = 0 (000 binary) 25 mA
Assist light value setting = 7 (111 binary) 200 mA
Flash Flash value setting = 0 (00000 binary) 300 mA
Flash value setting = 14 (01110 binary) 1000 mA
LED Current Error I
LED
= 700 mA to 1000 mA −6 +6 %
I
LED
= 300 mA to 650 mA −7 +7 %
I
LED
= 75 mA to 200 mA −10 +10 %
I
LED
= 25 mA to 50 mA −15 +15 %
LED Current Source Headroom
Flash, 1000 mA LED current
265
mV
Torch, 200 mA LED current 190 mV
LED_OUT Ramp-Up Time 0.6 ms
LED_OUT Ramp-Down Time 0.1 ms
SWITCHING REGULATOR
Switching Frequency Switching frequency = 3 MHz 2.8 3 3.2 MHz
Switching frequency = 1.5 MHz 1.4 1.5 1.6 MHz
Minimum Duty Cycle Switching frequency = 3 MHz 14 %
Switching frequency = 1.5 MHz 7 %
NFET Resistance 60 mΩ
PFET Resistance 50 mΩ
Voltage Output Mode
VOUT Voltage 4.575 5.000 5.425 V
Output Current 500 mA
Line Regulation
I
LOAD
at VOUT = 300 mA
0.3
%/V
Load Regulation −0.7 %/A
Pass Through Mode Transition, Flash
VIN to LED_OUT
Entry 1000 mA LED current 530 mV
Exit 1000 mA LED current 400 mV
Pass Through Mode Transition, Torch
VIN to LED_OUT
Entry 200 mA LED current 380 mV
Exit 200 mA LED current 285 mV